|Tipo di tesi||Tesi di laurea magistrale|
|Titolo||Progettazione e analisi di scambiatori di calore a schiuma metallica per moduli di potenza elettronici in vetture da corsa|
|Titolo in inglese||Design and testing of metal foam heat exchangers for race car power electronics|
|Struttura||Dipartimento di Ingegneria|
|Corso di studi||Ingegneria Del Veicolo (D.M.270/04)|
|Data inizio appello||2018-04-12|
|Disponibilità||Accessibile via web (tutti i file della tesi sono accessibili)|
Ad oggi, l’ambiente automotive è sempre più improntato alla ricerca e allo sviluppo dei motori ibridi, anche nel settore motor sport.
Currently the attention of automotive environment is increasingly focused on the research and the development of hybrid engines, even in the motor sport sector. The high performances required make the cooling efficiency of the electronic power modules of the power units more and more important. As a result of this process, it is strictly necessary to study ever more performing solutions to achieve a temperature reduction and / or a pumping power reduction. The aim of this thesis is to study analytically and numerically the use of metal open cell foams inside an exchanger to evaluate the heat exchange and the pumping power. Therefore, it was analyzed a representative geometry of the basic cell, composed of ligaments and nodes, whose structure represents the Kelvin tetrakaidekahedron cell. This basic cell was repeated in space in order to obtain an ordered structure with default dimensions, different from the current commercial foams. After that, it was considered the variation of exchanger domain module properties only according to the variations of metal cell geometry. Following this operation, it was possible to define three fundamental geometric parameters, that characterize the cell structure: the first one concerns the ligament length while the other two refer to transversal area shape of the ligament and to pyramid height of the cross-section ligament respectively. Through the modeling in CAD software, it was realized the solid parametric model of geometry. On this sample it is possible to operate to modify easily the parameters during the study. At the numerical level, for the creation of the computational domain and the development of the simulation - based on κ-ε turbulence models and a Low Reynolds approach - two software were used, Pointwise and OpenFoam. At last, the results obtained from the simulations were compared with a representative domain of the current solution in Ferrari car. In this way it was possible to evaluate the efficiency of the new solution compared to the above-mentioned one.